Don't test against Ruby 1.9.1 until Rack restores compatibility
Don't test against Ruby 1.9.1 until Rack restores compatibility

https://github.com/rack/rack/pull/173

fxposter/omniauth,ayunav/omniauth,github/omniauth,omniauth/omniauth,intridea/omniauth,nbrustein/omniauth,dougal/omniauth,sideci-sample/sideci-sample-omniauth,twalpole/omniauth,thomasmillergb/Year2-ruby-software-hut,ngpestelos/omniauth,toyokazu/omniauth_shibboleth,likeberi/omniauth,thomasmillergb/Year2-ruby-software-hut,mihar/omniauth-timekiwi,yui-knk/omniauth,poznyakandrey/omniauth